1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
|
/*
* Copyright (c) 1996
* Bill Paul <wpaul@ctr.columbia.edu>. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Bill Paul.
* 4. Neither the name of the author nor the names of any co-contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL Bill Paul OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef RPC_HDR
%#ifndef lint
%static const char rcsid[] =
% "$FreeBSD$";
%#endif
#endif
/*
* This protocol definition exists because of the U.S. government and
* its stupid export laws. We can't export DES code from the United
* States to other countries (even though the code already exists
* outside the U.S. -- go figure that one out) but we need to make
* Secure RPC work. The normal way around this is to break the DES
* code out into a shared library; we can then provide a dummy lib
* in the base OS and provide the real lib in the secure dist, which
* the user can install later. But we need Secure RPC for NIS+, and
* there are several system programs that use NIS+ which are statically
* linked. We would have to provide replacements for these programs
* in the secure dist, but there are a lot, and this is a pain. The
* shared lib trick won't work for these programs, and we can't change
* them once they're compiled.
*
* One solution for this problem is to do the DES encryption as a system
* call; no programs need to be changed and we can even supply the DES
* support as an LKM. But this bloats the kernel. Maybe if we have
* Secure NFS one day this will be worth it, but for now we should keep
* this mess in user space.
*
* So we have this second solution: we provide a server that does the
* DES encryption for us. In this case, the server is keyserv (we need
* it to make Secure RPC work anyway) and we use this protocol to ship
* the data back and forth between keyserv and the application.
*/
enum des_dir { ENCRYPT_DES, DECRYPT_DES };
enum des_mode { CBC_DES, ECB_DES };
struct desargs {
u_char des_key[8]; /* key (with low bit parity) */
des_dir des_dir; /* direction */
des_mode des_mode; /* mode */
u_char des_ivec[8]; /* input vector */
opaque desbuf<>;
};
struct desresp {
opaque desbuf<>;
u_char des_ivec[8];
int stat;
};
program CRYPT_PROG {
version CRYPT_VERS {
desresp
DES_CRYPT(desargs) = 1;
} = 1;
} = 600100029;
|
